European monitoring of notifications of hepatitis C virus infection in the general population and among injecting drug users (IDUs) – the need to improve quality and comparability Wiessing, L and Guarita, B and Giraudon, I and Brummer-Korvenkontio, H and Salminen, M and Cowan, S A, Eurosurveillance, 13, 18884 (2008), https://doi.org/10.2807/ese.13.21.18884-en